公开(公告)号：US20170331389A1

公开(公告)日：2017-11-16

申请号：US15152961

申请日：2016-05-12

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Prathamesh R. Vadhavkar ,  Brian J. Seibel

IPC: H02M5/458 ,  H02P27/06 ,  H02M5/453 ,  H02M5/42 ,  H02M1/08 ,  H02P23/00

CPC classification number: H02M5/4585 ,  H02M1/08 ,  H02M1/32 ,  H02M5/42 ,  H02M5/453 ,  H02M5/458 ,  H02M2001/325 ,  H02P23/0004 ,  H02P27/06 ,  H02P29/00 ,  H02P2201/03

Abstract: Power conversion systems and methods are provided for ride through of abnormal grid conditions or disturbances, in which a system rectifier is operated in a first mode to regulate a DC voltage of an intermediate DC circuit, an inverter is operated in the first mode to convert DC power from the intermediate DC circuit to provide AC output power to drive a load. In response to detecting an abnormal grid condition, the system changes to a second mode in which the rectifier is turned off and the inverter regulates the DC voltage of the intermediate DC circuit using power from the load.

公开(公告)号：US09535133B2

公开(公告)日：2017-01-03

申请号：US14071911

申请日：2013-11-05

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Brian J. Seibel ,  Russel Kerkman

IPC: G01R31/40 ,  H02J3/24 ,  H02J13/00 ,  H02J9/06

CPC classification number: G01R31/40 ,  H02J3/24 ,  H02J9/06 ,  H02J13/0006 ,  Y02B70/3291 ,  Y02B90/222 ,  Y04S20/12 ,  Y04S20/248

Abstract: Described herein are methods, systems, and apparatuses for determining sag in a signal. In one example, a method of tracking sag in a signal includes, when in an initial state, monitoring for when the signal transitions to a sag state based at least on an output of a tracking filter. In response to the signal transitioning to the sag state, increasing a bandwidth of the tracking filter and, when in the sag state, monitoring for when the signal transitions to a recovering state. The method further includes, in response to the signal transitioning to the recovering state, decreasing the bandwidth of the tracking filter.

Abstract translation: 这里描述了用于确定信号中的下垂的方法，系统和装置。 在一个示例中，跟踪信号中的下垂的方法包括：当处于初始状态时，至少基于跟踪滤波器的输出监视信号什么时候转变到松弛状态。 响应于信号转换到下垂状态，增加跟踪滤波器的带宽，并且当处于下垂状态时，监视信号何时转换到恢复状态。 该方法还包括响应于信号转换到恢复状态，减小跟踪滤波器的带宽。

公开(公告)号：US20150229257A1

公开(公告)日：2015-08-13

申请号：US14696648

申请日：2015-04-27

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Haihui Lu ,  Zhenhuan Yuan ,  Lixiang Wei ,  Russel J. Kerkman ,  Richard Lukaszewski ,  Ahmed Mohamed Sayed Ahmed

IPC: H02P9/00

CPC classification number: H02P9/006 ,  F03D7/0224 ,  F03D7/0284 ,  F03D7/0288 ,  F03D7/04 ,  F03D9/255 ,  H02H7/06 ,  H02H7/12 ,  H02H9/002 ,  H02J3/386 ,  H02J2003/001 ,  H02P9/007 ,  H02P9/102 ,  H02P9/48 ,  H02P2101/15 ,  Y02E10/723 ,  Y02E10/763

Abstract: A double fed induction generator (DFIG) converter, methods and computer readable mediums are presented in which rotor side current spikes are attenuated by selectively activating at least one series damping circuit to conduct current through a series damping circuit resistance coupled in series between one or more DFIG rotor leads and a grid side converter in response to a grid fault occurrence or a grid fault clearance, and selectively bypassing the series damping circuit resistance after activating the series damping circuit.

Abstract translation: 提出了一种双馈感应发电机（DFIG）转换器，方法和计算机可读介质，其中通过选择性地激活至少一个串联阻尼电路来使转子侧电流尖峰衰减，以将电流传导通过串联耦合在一个或多个 DFIG转子引线和电网侧转换器响应于电网故障发生或电网故障间隙，并且在启动串联阻尼电路之后选择性地旁路串联阻尼电路电阻。

公开(公告)号：US11641167B1

公开(公告)日：2023-05-02

申请号：US17575949

申请日：2022-01-14

Applicant: Rockwell Automation Technologies, Inc.

Inventor： James A. Ulrich ,  Lixiang Wei ,  Ahmed Mohamed Sayed Ahmed ,  Nickolay N. Guskov

IPC: H02M7/217 ,  H02M7/219 ,  H02M7/12

Abstract: A transformerless parallel active rectifier system includes N multiphase common mode inductors directly connected to a shared multiphase AC input with no intervening transformer, and N active rectifiers coupled to respective ones of the N multiphase common mode inductors and having respective DC outputs coupled to a shared DC bus, where N is an integer greater than 1. The N active rectifiers have ground current regulators and are synchronized to provide DPWM switching control signals synchronized to one another to regulate their respective ground currents and concurrently regulate the shared DC bus voltage.

公开(公告)号：US11152869B2

公开(公告)日：2021-10-19

申请号：US16834719

申请日：2020-03-30

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Robert J. Miklosovic ,  Ahmed Mohamed Sayed Ahmed

IPC: H02M5/458 ,  H02P27/06 ,  H02M1/12 ,  H02M1/08 ,  H02M3/02 ,  H02M1/00

Abstract: A system may include a power converter and a control system communicatively coupled to the power converter. The control system may determine a first DC voltage associated with the DC bus based on one or more DC external capacitance values that correspond to one or more loads coupled to the power converter. The control system may also determine a second DC voltage associated with the DC bus based on a capacitance of a system in which the power converter operates. The control system may also determine a third DC voltage associated with the DC bus based on the first DC voltage and the second DC voltage and adjust an operation of the power converter based on the third DC voltage.

公开(公告)号：US09270286B2

公开(公告)日：2016-02-23

申请号：US14319469

申请日：2014-06-30

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Ahmed Mohamed Sayed Ahmed ,  Russel J. Kerkman ,  Brian J. Seibel

IPC: H03L7/06 ,  H03L7/08 ,  H03L7/085

CPC classification number: H02J3/01 ,  H02J3/48 ,  Y02E40/40

Abstract: Present embodiments relate to a method for synchronizing an electric grid. The method includes receiving a phase voltage of the electric grid. The method further includes determining one or more disturbance frequencies in the phase voltage via a plurality of sequential tracking filters, wherein each of the plurality of tracking filters corresponds to a harmonic of the received phase voltage. The method further includes removing the disturbance frequencies components sequentially to produce a minimally distorted frequency, and performing a PLL operation on the clean frequency to determine a phase angle of the frequency.

Abstract translation: 本实施例涉及一种同步电网的方法。 该方法包括接收电网的相电压。 该方法还包括经由多个顺序跟踪滤波器来确定相电压中的一个或多个扰动频率，其中多个跟踪滤波器中的每一个对应于接收相电压的谐波。 该方法还包括顺序地去除干扰频率分量以产生最小失真的频率，以及对干净频率执行PLL操作以确定频率的相位角。

公开(公告)号：US09124245B2

公开(公告)日：2015-09-01

申请号：US14551333

申请日：2014-11-24

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Russel J. Kerkman ,  Ahmed Mohamed Sayed Ahmed ,  Brian J. Seibel

IPC: H03H11/04 ,  H03F1/56 ,  H03H7/38 ,  G01R25/00 ,  H02M1/42

CPC classification number: H03H11/04 ,  G01R25/00 ,  H02M1/4233 ,  H03F1/565 ,  H03H7/38 ,  Y02B70/126

Abstract: A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.